Справочник Пользователя для Netopia R3100

Cause No. 3:  no route to destination. This cause indicates that the called user cannot be reached because 
the network through which the call has been routed does not ser ve the destination desired.

This cause is suppor ted on a network-dependent basis.

Cause No. 6:  channel unacceptable. This cause indicates that the channel used in this call is not acceptable 
to the sending entity.

Cause No.7:  call awarded and being delivered in an established channel. This cause indicates that the user 
is receiving an incoming call, which is being connected to a channel already used by that user for similar calls 
(e.g., packet-mode X.25 vir tual calls).

Cause No. 16:  normal call clearing. This cause indicates that the call is being cleared because one of the 
users involved in the call has requested that the call be cleared.

Under normal situations, the source of this cause is not the network.

Cause No. 17:  user busy. This cause is used when the called user has indicated the inability to accept another 
call.

It is noted that the user equipment is compatible with call.

Cause No. 18:  no user responding. This cause is used when a user does not respond to a call establishment 
message with either an aler ting or connect indication within the prescribed period of time allocated (defined in 
Recommendation Q.931 by the expir y of either timer T303 or T310).

Cause No. 19:  no answer from user (user alerted). This cause is used when a user has provided an aler ting 
indication but has not provided a connect indication within a prescribed period of time.

This cause is not necessarily generated by Q.931 procedures but may be generated by internal network timers.

Cause No. 21:  call rejected. This cause indicates that the equipment sending this cause does not wish to 
accept this call, although it could have accepted the call because the equipment sending this cause is neither 
busy nor incompatible.

Cause No. 22:  number changed. This cause is returned to a calling user when the called par ty number 
indicated by the calling user is no longer assigned. The new called par ty number may optionally be included in 
the diagnostic field. If a network does not suppor t this capability, cause No. 1, unassigned (unallocated) 
number, shall be used.

Cause No. 26:  non-selected user clearing. This cause indicates that the specified user has not been awarded 
the incoming call.

Cause No. 27:  destination out of order. This cause indicates that the destination indicated by the user cannot 
be reached because the inter face to the destination is not functioning correctly. The term “not functioning 
correctly” indicates that a signaling message was unable to be delivered to the remote user: e.g., a physical 
layer or data link layer failure at the remote user, user equipment off-line, etc.

Cause No. 28: invalid number format (address incomplete). This cause indicates that the called user cannot 
be reached because the called par ty number is not a valid format or is not complete.

Cause No. 29: facility rejected. This cause is returned when a facility requested by the user cannot be 
provided by the network.

Cause No. 30:  response to STATUS INQUIRY. This cause is included in the STATUS message when the reason 
for generated the STATUS message was the prior receive of a STATUS INQUIRY message.

Cause No. 31:  normal, unspecified. This cause is used to repor t a normal even only when no other cause in 
the normal class applies.